Electric regulation.



J. L. CREVELING. ELECTRIC REGULATION. APPLICATION FILED JUNE21,1911.

1,007,186. Patented-Oct. 31,1911.

1 tannin-- 7 14 INVENTOR thereof.

invention pertains to that class of .ety. cisa UNITED STATES T ()FFICE.

JOHN L. CREVELING, OF NEW YORK,

N. Y., ASSIGNOR TO SAFETY CAR HEATING AND LIGHTING COMPANY, ACORPORATION OF NEV JERSEY.

ELECTRIC REGULATION.

Specification of Letters Patent.

Application filed June 21,1911. Serial No. 634,496.

specification and drawing forming a part y electric regulation whereinit is desired to regulate a dynamo or generator in a predeterminedmanner and in accordance with the duty to be performed thereby.

Figure '1 is a diagrammatic representation of ,one type of system ofelectric distributionlcomprehending my invention. Fig. 2 is adiagrammatic representation of a modified system comprehending myinvention.

In the drawing, particularly Fig. 1, 1 represents a dynamo or generatorprovided with the usual field coil having in series therewith thevariable resistance 3, in this instance indicated as of the carbon pilevarilever normally drawn 1n an upward direction by the adjustable spring5 and limited in its upward movement as by the adjustable screw 6. Thelever dis provided at its extremity with the magnetic core? and it willbe obvious that motion imparted to the core], by varying the resistance3, may regulate the generator. 8 is a lever normally drawn in a downwarddirection by the adjustable spring 9 and has its motion limited in thisdirection by the adjustable screw 10. 11 is the positive lead of thegenerator. and is connected with the positive side of the storagebattery 12 and through the switch 13 with the posltive side of the lampsor other translating devices indicated at 14. The negative terminals ofthe translating devices are connected with the wire 15 which is carriedto one side of the translation circuit regulator 16 indicated in thisinstance as a resistance of, the carbon pile variety. .The opposite sideof the carbon pile 16 is connected as by the Wire 17 with one side ofthe automatic switch 18 which may be of any of the wellknown varietiesadapted to close the generator circuit when its voltage is substantiallyequal to that of the battery. The negative side of the storage battery12 is connected to the main 17. The remaining terminal of the switch 18is connected as by wirefl i across the same is through solenoid 20 withthe negative brush of the generator. The core 21 is attached to thelever 8. and normally drawn in an up Wvard direction by excitation ofthe coil 20.

The core 7 is surrounded by 'the solenoid 22 in shunt across thegenerator circuit in such manner that excitation of the same tends todraw the core downwardly and increase the resistance 3. The coil 23 alsosurrounds the core 7 and is connected in shunt across the lamp regulator10in such manner that current flowing in the. 001123 due to a drop inpotential V across the resistance 16 will assist the coil 22 in drawingthe core 7 downwardly. The carbon pile 16 isoper- 'ated by the lever 24:normally drawn. in a downward direction by the adjustable spring 25 andprovided with a magnetic core surrounded by the solenoid 26 in shuntacross the translation circuit.

In the system shown in Fig. 2 like numerals are used to designate likeparts and the only difference between the two systems is that in Fig. 2the coil 20 'inseries with the generator is su pressed and the coil :27in serieswith the battery only used in its stead.

The operation of my invention is substantially as follows: If thegenerator be running at. avoltage sufilcient to charge the" storagebattery, the switch 18.will be closed and current will flow from thegenerator 1 through the field coil 2, resis ance 3 and the generatormaybe regulated by proper inanipulation of the resistance 3' in a-Wellknown manner. Current will also flow from the generator through thelead 11, storage battery 12, wire-17, switch 18, wire-19, and coil 20 tothe generator and, if the speed of the enerator be such that its voltagebe sufficient to supply the maximum current desired, I so adjustgenerator tend to exceed this current, the coil 20 Will lift the core 21and raise the lever 8 against the action of spring 9 so as to increasethe resistance 3 and prevent the current output from exceeding thismaximum. lf nowthe battery be charged unt-il the maximum voltagedesired-to have I reached, l thenso adjustthe spring 5 that any furtherrise in voltage will be prevented by the coil drawing the core 7fdownwardly against the action of sprin'g5 and thus depressing the l0V614;.aI1(l desired I Patented 0a. 31, 1911'.

the spring 9 that if the c k increasingthe resistance 3 in a Well-knownmanner. As this voltage cannot be exceeded, the current through thebattery will, of course, fall off if the voltage of the batteryincreases further. If now the lamp switch 13 be closed anda load thusthrown upon the translation circuit, it is desirable that the generatorbe carried at a voltage below the maximum desired upon the battery inorder that there Will be less difiiere'nce of potential between thesupply circuit and the translation circuit which difli'erence of po--tential between the two circuits is usually dissipated in the form ofWaste heat. I so adjust the spring 25 that when the maximum desiredvoltage across the translation circuit is reached, the coil 26 willraise the lever 24 and increase the resistance 16 in such manner as tohold the lamp voltage constant, and

this, of course, will cause a drop across the resistance 16 which willincrease as the voltage upon the translation circuit tends to increase.This drop across 16 will cause current to how through the coil 23 whichis wound to assist the coil 22 and the standard voltage which the coil22 tends to hold across the leadsthroughout speed changes of thegenerator will be lowered and the generator may be thus controlled inresponse to voltage fluctuations at a lower voltage than the maximumvoltage desired to have across the battery when there is no load, uponthe translation circuit.

The operation of the system portrayed in Fig. 2 may be readilyunderstood from the operation above outlined with regard to the systemshown in'Fig. 1, it being only necessary to remember that the lever 8 inFig. 2

- is controlled by the coil 27 in series with the 40 parture may be madein the way of details without departing from the scope of my inventionwhich is as set forth in the following claims:

- 1. The combination with a generator, a

storage battery, a translation circuit and 'a regulator for thetranslation circuit, of

means for regulating the generator, means controlhng said regulatingmeans responsive to voltage fluctuations, means for controlling said"regulating means responsive to current fluctuations and means foraffecting the voltage responsive means affected by the operation of thetranslation circuit regulator.

2. The combination with a generator, a-

storage battery, a translation circuit and regulator for saidtranslation circuit, of a generator regulating means, means foropcrating the said regulating means responsive to voltage fluctuatlons,means for operating the said-regulating means responsive to currentfluctuations and means for affecting the operation of the voltageresponsive means affected by voltage variationupon the translationcircuit. a

3. The combination with a generator, a

storage battery, a translation circuit and a regulator for saidtranslation circuit. of. a

regulating element for controlling the generator, voltage responsivemeans for controlling said regulating element, current responsive meansfor controllingsald regulatventing useful current in a circuit suppliedby said generator from exceeding a prede' termined limit and meanswhereby the value of electromotive force held from being exceeded by thevoltage responsive means is adjusted by the'operation of the translationcircuit regulator.

5. The combination with a generator having a field winding, a storagebattery, a translation circuit and a translation circuit regulator, ofmeans for controlling the generator comprehendinga variable resistancein circuit with the field winding, means for controlling said variableresistance responsive to voltage fluctuations, means forcontrolling'said variable resistance responsive to curren-t fluctuationsand means for afl'ecting the operation of the voltage responsive meansin response to operation of the translatlon circuit regulator.

JOHN L. OREVELING.

Witnesses:

CHAS. MCC- CHAPMAN, Anna MARIE WALL.

.Copies of this patent may be obtainedfor five cents each, by addressingthe Commissioner or latents, Washington, D. G.

